Interestingly, researchers didn’t expect marijuana to actually have more long-term effects on memory than alcohol does. Researchers found that continued cannabis usage throughout the teenage years effects four specific components of a teenagers memory: Problem-solving, long-term memory, short-term memory manipulation, and the ability to stop a habitual behavior when needed.

The scientists who penned the study looked at 4,000 students from Montreal, Canada from around the age of 13 onward. From